Abstract
Abstract Generally, an optical vortex lattice (OVL) is generated via the superposition of two specific vortex beams. Thus far, OVL has been successfully employed to trap atoms via the dark cores. The topological charge (TC) on each optical vortex (OV) in the lattice is only ±1. Consequently, the orbital angular momentum (OAM) on the lattice is ignored. To expand the potential applications, it is necessary to rediscover and exploit OAM. Here we propose a novel high-order OVL (HO-OVL) that combines the phase multiplication and the arbitrary mode-controllable techniques. TC on each OV in the lattice is up to 51, which generates sufficient OAM to manipulate microparticles. Thereafter, the entire lattice can be modulated to desirable arbitrary modes. Finally, yeast cells are trapped and rotated by the proposed HO-OVL. To the best of our knowledge, this is the first realization of the complex motion of microparticles via OVL. Thus, this work successfully exploits OAM on OVL, thereby revealing potential applications in particle manipulation and optical tweezers.
Highlights
In 1974, Ney and Berry discovered the dislocations in wave trains that inspired the interest in phase singularities and optical vortices [1]
To the best of our knowledge, this is the first realization of the complex motion of microparticles via optical vortex lattice (OVL)
In 1992, Allen et al [2] discovered that photons possess orbital angular momentum (OAM), which afforded them an additional degree of freedom
Summary
In 1974, Ney and Berry discovered the dislocations in wave trains that inspired the interest in phase singularities and optical vortices [1]. In 1992, Allen et al [2] discovered that photons possess orbital angular momentum (OAM), which afforded them an additional degree of freedom. An optical vortex (OV) possesses a helical phase, exp(jmθ), and OAM, mħ, where m is the topological charge (TC) and θ is the azimuthal coordinate. To satisfy the requirements of versatile applications, an OV lattice (OVL) containing multiple unit OVs was extensively studied [10,11,12,13,14,15,16,17,18,19]. OVL is generated via the superposition of OV beams with the OV inlay in the intensity pattern
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